基于控制历史的过热汽温模糊串级控制  

FUZZY CASCADE CONTROL BASED ON CONTROL'S HISTORY FOR THE SUPERHEATED TEMPERATURE

作　　者：王广军[1] 李刚[1] 沈曙光[1] 

机构地区：[1]重庆大学动力工程学院,重庆市沙坪坝区400044

出　　处：《中国电机工程学报》2005年第20期89-93,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50476041)~~

摘　　要：针对过热汽温对象具有大迟延、不确定等特点,设计出了一种基于控制历史的串级控制系统。在对控制对象的动态特性分析的基础上,用历史的控制信息代替偏差变化率作为模糊控制的决策依据,从而及时地反映出被控制量的变化趋势;并在此基础上,引入了比例环节,综合了PID控制器和模糊控制器的优点,克服了传统模糊控制器结构上的缺陷。通过仿真实验,将用该控制器构成的汽温串级控制系统的控制效果与常规PID及传统模糊控制作比较,证明了所提出的控制方案能够有效减小延迟时间对控制效果的影响,具有较强的适应性。To the characteristics of the large delay and uncertainty of superheated temperature, a new cascade control system is presented based on control＇s history. On the analysis of the control objects＇ dynamic characteristics, the historical control information is used as the decision basis of the fuzzy control to substitute for the deviation change rate. So the changing trend of controlled variable can be reflected on time. Further more, proportional component is introduced, the advantages of PID and fuzzy controllers are integrated, and the structure weaknesses of traditional fuzzy controllers are overcome. Simulation testing shows this control method can effectively reduce the adverse impact of the delay time on control effects and has strong adaptability, by the comparing the superheated temperature control system composed by this controller with PID and traditional fuzzy controllers.

关 键 词：热能动力工程 延迟系统 模糊控制 过热汽温控制系统 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]